Hi,
You may use the report RSUSR200 in SE38.
- List all the users from USR02 (This will contain the non-dialog users as well)
- Execute the report RSUSR200 in SE38
- Enter the users from USR02
- Check the option 'Dialog Users' in the section 'Selection by User Type' and execute.
The output will contain all the dialog users along with other information such as the last logon date etc. Run the report in the background.
Cheers!!